Cotton gin



July 16, 1,929. w L4 PETTIT 1,721,036

COTTON GIN Filed June 10, 1927 amm?,

Patented July 16, 1929.

1,721,036 PATENT OFFICE.

WILLIAM L. PETTIT, oi@` Mniurnis, TENNESSEE.

COTTON GIN.

Application filed .Tune 10, 1927. Seriallo.V 197,851.

This invention relates to improvements in cottongins or re-gins. 1 y

More particularly the invention relates to an attachment for cleaning the cotton asit is being ginned or re-ginned, one object of the. invention being to provide an attac-hment of this nature which may be installed in machines already in use.

l A further. object of the invention is to provide a cotton cleaning attachment for gins or re-gins-which may be readily adjusted with respect to the gin saws so to secure f an efficient cleaning ofv the cotton whether the latter be long or short fibered.y

More specifically, the invention comprises an air duct adjustably secured to the cotton gin casing, said duct having one end terminating within the gin in close proximity to the gin saws, there being a suction fan at the exterior of the casingadapte'd to draw or suck dirt or foreign matter from the cotton on the gin saw teeth through the i-nner terminal of said duct. As before mentioned the .duct is adjustable toward or from the gin saw teeth and there is also a damper in said duct to regulate the suction.

With these and other objects in view, the invention consists in certain novel details of construction and combinations and arrangements of parts, all as will hereinafter be more fully described and the novel features thereof particularly pointed out in the appended claims.

In the accompanying drawings,

Figure 1 is a sectional view of a commen cial type of gin taken transversely of the shaft of the gin saws.-

Fig. 2 is a perspective view of the air duct detached, portions of said duct being broken away to illustrate portions of the interior construction thereof.

The attachment, which is capable of being installed'on practically any type of gin or re-gin, is illustrated in the present instance in connection with an ordinary gin comprising the usual gin ribs 2() between which the gin saws 21 on shaft 22 pass. Asis well understood, cotton caught on the revolving gin saw teeth 23 is pulled off of the cotton seed, the libre passing between gin ribs 20, said teeth carrying such cotton around until it is removed therefrom by some suitable means. Such removing means may consist of the gin brush 24 although some gins are provided with an air blast for removing the` cotton from the gin teeth.

TheseA several partsare enclosed within the gin casing 25.and operate in the ordinary manner; In' accordance with the present invention, however, there is secured to the gin casing 25 an air duct 26 having one end in the forni of a nozzle 27 extending into the gin in proximity to the periphery of the gin saws. The rduct 26 extends to the exterior of the casing and at some suitable point is adapted to be connected to a suction fan whereby air will be drawn into the nozzle 27, this draught of air through the duct beingcontrolled by a damper 28. Nozzle 27 is located between the gin ribs 20 and the point at which brush 24 removes the .fiber from the saws 21 and after the cotton fiber is .drawn between the gin ribs by the saw teeth in a combed and straightened condition the draught of air, directed radially outward from the saws by the duct andy (as shown by the arrow) .against the points of the hook-shaped saw'` teeth 23, draws the foreign matter outl of the cotton fiberinto the mouth of the nozzle and through the duct.

In order that the apparatus may act with the same degree of efficiency on either long or short fibered cotton the duct 26 is adjustably attached to casing 25 so as to permit the nozzle 27 to be adjusted toward andy from the peripheries of saws 21. Such adjustable connection may consist of an ordinary bolt c and slot connection, bolts 29 fixed to the nozzle 27 projecting through slots 3() in brackets 31 which are attached to the casing 25. Bolts 29 are provided with nuts 32 and by loosening up said nuts, bolts 29 maybe moved in slots 30 to vary the space between the terminal of nozzle 27 and the gin saws, after which nuts 32 are again tightened to clamp moved from the cotton by centrifugal force,y

it would be impossible to use the suction draft only, because the cotton would be pulled off the saw teeth. Again, the use of a suction draft for removing foreign particles from the cotton while on the saw teeth, as contemplated in the present invention, possesses advantages over those structures of the prior art wherein the removal of foreign particles from the cotton by use of a forced draft 1s proposed because, with a forced draft, the foreign particles would be driven into the cotton, so to speak, in the absence *ofi a special gin saw construction for preventing such action.

That I claim is:

l. In a cotton treating apparatus, the combination of the casing having a chamber therein, gin ribs in said chamber, rotatable gin saws cooperating with said ribs, and means for directing a suction draft through cotton carried by said saws in a direction radially outward from the saws to remove foreign material from cotton on said saws.

2. In a cotton treating apparatus, the combination of the casing having a chamber therein, gin ribs in said chamber', rotatable gin saws cooperating with said ribs, a suction flue extending into said chamber with its end in close proximity to sai-d saws whereby air will be sucked through the cotton on the saws in a direction radially outward from the saws to remove foreign materialfrom cotton on said saws and means for creating a suction draft in said flue.

3. In a cotton treating apparatus, the come bination of a casing having a chamber therein, gin ribs in said chamber, rotatable gin saws cooperating with said ribs, and means for creating a draft of air through cotton carried on the teeth of said saws radially outward from said saws to remove foreign ma terial from the cotton, said means comprising a suction flue projecting into said chamber and terminating adjacent the gin saw teeth, and means for creating a suction draft through'said Hue, the terminal of said flue be ing` adjustable toward and-from said saw teeth.

4. In a cotton treating apparatus, the combination of a casing having a chamber there-r in, gin ribs in said chamber, rotatable' gin saws cooperating with said ribs, and means for creating a draft of airthrough cotton carried on the teeth of said saws radially outward from said saws to remove foreign material from the cotton, said means comprising a suction flue attached to said casing and pro'- jecting into said chamber' with its inner terminal positioned adjacent the saw teeth, a bolt and slot connection betweensaid yHue and casing whereby said inner terminal may be adjusted radially of the saws toward and from said teeth, and means for removing the cotton from said teeth after the teeth and cotton have passed the inner terminal of said flue.

WILLIAM PETTIT. 

